Chemical heating device.



UNITED STATES "PATENTv OFFICE, 1

lWILHELMEsPE-NHAXN ANDFRIEDRICH osWALD HUNGERQOFCHEMMTZ, l f'M-GERMANY-- Nsamaea;

To aLl-1 whom, ntycortcrn:

Beit known that we, WILHELM EsPEN- HAYN and FRIEDRICH OswALD HUNGER,sub-y jectslof the 4German Emperor, and residents 5 of Chemnitz,Germany, have invented an Imwarmingfood, liquids, or other substances ina semiliquid state.' c

We have illustrated a4 simple form -`of our invention in theaccompanying drawings, in

Figure 1 is a vertical section of the rece tacles we employ for thechemicals and t e fluid to be mixed therewith, showing our IfFigs. 2 and3 are plan viewsof said recepta- 4cles, sealed and unsealed. f

Inl carrying our invention into practice, wel

"These chemicals-w en brought into contactv *l with the fluid generatean intense heat.

In'the open end of the c linder a we fix a l funnel-sha ed.receptacle.to contain the water or t e like.

where vthis hole f is formed bein bent inward,

' forming the recess g. Over t ese openings d, e, and f we secure withsoft'so'ldei` a stri of 'tin or the like h, so as to` hermetically c osethe receptacles.4 Wehave shown the doubled part 'i of said stripprojecting upward; -but in practice it is bent around one of the usualtin-opener ke s, such as used with sardine-boxes and the e'.

Specicaton of Letters Patent. Anuman mea imm 1s, 190s. semi No.240.932'. c

Vl method ofh'ermetically sealing'A same; and

Said receptacle'has. a preferbly dishedcover c soldered to it,andratene'a July 31, i906.

Before the funnel-shaped` rece tacle b and cover'c are placed inposition on t ecylindera the latter is filled to about half its capacitywith the lime or otherchemical emp oyed. Then, one end of the stri hhaving been soldered over the hole'or ho es d'with its free end`projecting through the opening e in the c over the conical receptaclebis secured in osition,

as already described, and filled with t e water vice, the key re erredto, which engages the strip h at i, is turned so as to wind said strip uon itself, wherebtlfirst the air-hole f, thent e opening e, and ally thehole d aregrad'- yor other fluid employed, whereuponthe stripl uallyunsealed. The water or other fluid in 3 thereceptacle b flows throughsaid hole d into the cylinder a, and in a very short time considerableheat is generatedby its 'combina'- tion with the. chemicals containedtherein,

which heat may be communicated to the sub- -nor the 'fluid employed inour device can come intocontact with the food or the like to l beheated. h.

Having now particularly described and ascertained the nature of oursaidinvention and in what manner thel same is to be performed, wedec-lare that what we claim'ls- 1.A In a device of the characterdescribed, the combination .with two rece taclesy adapted'to containsubstances whic when mixed. together produce heat, one offsaidreceptacles bemg carried byv and forming a closure for the otherreceptacle, the first receptacle hav- 'in a filling-opening and anopening to provi e commumcation between the two,.recep'r ytacles and aband soldered to the rece tacle having the openings and forming a tig tclosure for said openings and adapted to be operated from a pointexteriorly of the recepta cles to cause 1t to uncover the said opemngsfor the pur ose set forth.

2.' In a evice of the character described, the combination with two,rece tacles adapt-V edto contain substances which together produce heat,one of said receptacles being carried b and forming a closure for theother receptacle, the first-named receptacle when mixed;

IOO

having a vent-opening adapted to place the interior of the secondreceptacle in communication With the outer air, and said rst receptaclealso having a fillin -opening and an opening adapted to place theinterior of both receptacles 1n communication, and a single stripsoldered to the receptacle having the three openings and forming a tightclosure. vfor all of said openings and adapted to be operated from apoint exteriorly of said receptacles to uncover the openings'for thepurpose specified.

3. In a device of the character described, the combination with tworeceptacles a b, adapted to contain substances which whenmixed'togetherproduce heat, the receptacle b being carried y and forminga closure for riorly of the receptacles to cause the strip to uncoverthe various openings.

In testimony whereof we have hereunto set our hands in presence of twowitnesses.

l WILHELM ESPENHAYN.

FRIEDRICH. @swim II-UNGER.

Witnesses:

J. F. MONAGHAN, FREDERICK J. DIETZMAN.

